Eoarchean Era

This was the first era in the Archean Eon, as well as the first era ever, as the Hadean Eon didn’t have any official eras.

During this era, the surface on Earth May have had some solid crust and still some molten crust.

By the end of the Eoarchean Era, the earliest life forms, may have begun forming, which would continue into the Paleoarchean Era.

Rocks have been found from this era, 3.7-3.8 billion years ago.